Co-Cl-C composited films prepared by flash Joule heating system as an efficient electrocatalyst for the oxygen and hydrogen evolution reaction

Co-based compound is a kind of bifunctional electrocatalyst for the half reactions of water splitting. Here we report the catalytic performance of Co-Cl-C composited catalyst prepared by flash Joule heating system in oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). It is found that Co-Cl-C composited film is an efficient electrocatalyst of OER and HER. In addition, the flash Joule heating is a fast, low energy consumption, and environmentally friendly preparation method. It opens up a new idea for the preparation method of composite materials.